Help me find: Leather Horizontal Belt Clip Case

I'm pretty particular about the case I have for a phone. I've currently got a Sony Ericsson K850 which I found a great case for - it's a leather horizontal case that has a belt clip and two belt loops - with a magnetic flip top. I'm planning on buying an iPhone 3GS this week and I'd love to have a similar case for it, but unfortunately I haven't had much success in locating something like it online.